Refractory for heating furnace

Refractory for heating furnace

With the large-scale and high efficiency of the rolling mill, the heating furnace put forward higher demand, its development trend is large, low consumption, pollution-free and operational automation, building materials and therefore divided into side-open and lift Two kinds. The door is generally made of clay brick, refractory castable or refractory plastic, high aluminum insulation brick or refractory fiber mats and other materials for lining. Side open the door can use a furnace service, lift door due to temperature fluctuations and mechanical impact and other factors, the service life of about la. Out of the riveting with refractory material with the side of the billet heating furnace.
In addition to water-cooled cast iron out of the trough, the general use of high alumina brick or masonry masonry, the service life of 3 to 6 months. Sintered mullite or fused mullite large brick masonry, high strength, good wear resistance, but the thermal shock resistance is poor, easy to crack, its life around 1a. The use of heat-resistant steel fiber staggered corundum refractory castable in the field into the overall steel trough, the service life of more than 2a.
Ceramic chute with a small push-type refractory furnace, from the corundum a silicon carbide slide rails composed of ceramic slide. In the length of the furnace with a refractory brick masonry two or four rows of the wall. In the base wall masonry high alumina silicon carbide brick, and then install the sliding rail brick and composed of ceramic slide. Billet in the slide on the move to achieve the upper and lower sides of the heating, with less energy, billet without black and so on. Ceramic chute to withstand high temperature, billet load, high temperature wear and corrosion of iron oxide slag and other effects, the use of more demanding conditions, the life of about 1a. The bottom of the water cooling 'adiabatic refractory materials, large and medium-sized push silver or walking beam furnace, the bottom of the water cooling pipe is a vertical, horizontal distribution and support the role of thick-walled water cooling pipe composition. The purpose of adiabatic is to reduce the heat from the cooling medium, reduce the billet black print and improve the quality of heating.
The adiabatic way is divided into special-shaped clay brick mosaic or horseshoe-shaped brick hanging, refractory plastic or refractory castable made of welded tile prefabricated block welding or with the material and refractory fiber felt on-site dressing. Life is generally 3 to 12 months. When the use of high-quality refractory plastic, ultra-low cement or cement-free refractory castables for field dressing, the life of more than la. Flue and smoke for their own use refractory lase lining generally with dry clay masonry, can also be used refractory castable prefabricated block hanging or on-site watering, and sometimes can be used refractory spray coating construction. Red brick or concrete chimney in high temperature area with refractory masonry. Metal chimney wall welding metal anchor nails, sometimes with metal mesh, the use of lightweight refractory castable or refractory spray for lining, construction convenience, integrity, long service life. (Refresable for rehea-ting fumace) Refractory materials used in masonry furnaces and related parts. The furnace is used for rolling or forging steel. Heating billet or small steel ingot thermal equipment, the use of the temperature is generally 13 of a 1 40. ℃.
This type of furnace is generally made of refractory clay brick masonry, heating section and soaking section roof is also useful 3-high aluminum brick 'lining damage is mainly due to high temperature, thermal stress, air erosion and mechanical collision caused by the role of high temperature The lower part of the furnace wall, the bottom of the furnace and the water-cooled tube packing layer and other parts are also affected by the erosion of molten iron oxide slag, therefore, masonry or mattress magnets for the protective layer, water pipe dressing layer with high alumina refractory. With the large-scale rolling mill and high efficiency, the heating protection made a higher demand, its development trend is large, low consumption, pollution-free and operational automation, building materials and therefore open and lift two The The door is generally made of clay brick, refractory castable or refractory plastic, high aluminum insulation brick or refractory fiber mats and other materials for lining.
Side open the door can use a furnace service, lift door due to temperature fluctuations and mechanical impact and other factors, the service life of about la. Out of the riveting with refractory material with the side of the billet heating furnace. In addition to water-cooled cast iron out of the trough, the general use of high alumina brick or masonry masonry, the service life of 3 to 6 months. The use of sintered or fused mullite large brick masonry, high strength, good wear resistance, but the thermal shock resistance is poor, easy to crack, its life around 1a. The use of heat-resistant steel fiber staggered corundum refractory castable in the field into the overall steel trough, the service life of more than 2a. Ceramic chute with a small push-type refractory furnace, from the corundum a silicon carbide slide rails composed of ceramic slide. In the length of the furnace with a refractory brick masonry two or four rows of the wall.
In the base wall masonry high alumina silicon carbide brick, and then install the sliding rail brick and composed of ceramic slide. Billet in the slide on the move to achieve the upper and lower sides of the heating, with less energy, billet without black and so on. Ceramic chute to withstand high temperature, billet load, high temperature wear and corrosion of iron oxide slag and other effects, the use of more demanding conditions, the life of about 1a. The bottom of the water cooling 'adiabatic refractory materials, large and medium-sized push silver or walking beam furnace, the bottom of the water cooling pipe is a vertical, horizontal distribution and support the role of thick-walled water cooling pipe composition. The purpose of adiabatic is to reduce the heat from the cooling medium, reduce the billet black print and improve the quality of heating. The adiabatic way is divided into special-shaped clay brick mosaic or horseshoe-shaped brick hanging, refractory plastic or refractory castable made of welded tile prefabricated block welding or with the material and refractory fiber felt on-site dressing. Life is generally 3 to 12 months. When the use of high-quality refractory plastic, ultra-low cement or cement-free refractory castables for field dressing, the life of more than la.
Flue and smoke for their own use refractory lase lining generally with dry clay masonry, can also be used refractory castable prefabricated block hanging or on-site watering, and sometimes can be used refractory spray coating construction. Red brick or concrete chimney in high temperature area with refractory masonry. Metal chimney wall welding metal anchor nails, sometimes with metal mesh, the use of lightweight refractory castable or refractory spray for lining, construction convenience, integrity, long service life. Refractory material for refineries for rehea-ting fumace The refractory used in masonry furnaces and related parts The heating furnace is a thermal equipment used to heat billets or small billets when rolled or forged steel. Generally for a 13 of 13. ℃. This type of furnace is generally made of refractory clay brick masonry, heating section and soaking section roof is also useful 3 high aluminum refractory bricks' lining damage is mainly due to high temperature, thermal stress, air erosion and mechanical impact caused by such a high temperature The lower part of the furnace wall, the bottom of the furnace and the water-cooled tube packing layer and other parts are also affected by the erosion of molten iron oxide slag, therefore, masonry or paving magnesia for the protective layer, water pipe dressing layer with high alumina refractory.


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The use of silicon carbide

Silicon carbide Use Subdivision:
1, non-ferrous metal smelting industry applications
The use of silicon carbide with high resistance, high strength, good thermal conductivity, impact resistance, for high indirect heating materials, such as cans distillation furnace, distillation furnace tray, aluminum cell, copper melting furnace refractory lining material, zinc powder furnace arc Type plate, thermocouple protection tube.
2, the application of the steel industry
The use of silicon carbide corrosion resistance, thermal shock resistance to wear, good thermal conductivity characteristics for large blast furnace lining to improve the service life.
3, metallurgical and mineral processing industry applications
Silicon carbide hardness second only to the diamond, with a strong wear resistance, wear-resistant pipe, impeller, pump room, cyclone, ore lining the ideal material, the wear resistance is cast iron, rubber life of 5 -20 times, is also one of the ideal materials for aviation flight runway.
4, building materials ceramics, grinding wheel industry applications
The use of its thermal conductivity, heat radiation, high heat intensity of the characteristics of the manufacture of thin plate kiln, not only can reduce the kiln capacity, but also improve the furnace capacity and product quality, shorten the production cycle, is ceramic glazed baking sintering Ideal indirect material.
5, energy-saving applications
Silicon carbide brick is a typical polycrystalline compounds, according to the major categories, there are two kinds of α-silicon carbide and β-silicon carbide. α-silicon carbide as abrasive black and green varieties. β-SiC is the main refractory raw material for the preparation of silicon carbide ceramics. Silicon carbide is widely used, such as: metallurgy, machinery, chemicals, building materials, light industry, electronics, heating body. Abrasive can be used as a cleaning agent for the metallurgical industry, deoxidizer and modifier. In the mechanical processing can be used as synthetic carbide cutting tools; after processing silicon carbide plate can be used as a refractory material for ceramic firing plate. Through the production of fine powder after finishing, can be used for high-tech electronic components and far infrared radiation materials, paint. High purity fine powder for national defense industry aerospace vessel coating. The use of international and domestic economic fields is very broad.
Silicon carbide semiconductors can cope with the "extreme environment", allegedly silicon carbide chips can even withstand Venus or the heat near the sun. Previous studies have shown that silicon carbide wafers can operate normally without a cooling device even at high temperatures of 560 degrees Celsius. Silicon carbide chips in the field of communication has a broad application prospects, allowing high-definition TV transmitter to provide clearer signals and images; can also be used in jet and car engines to monitor the motor running. At the same time, it can also be used in the field of space exploration, to help nuclear power spacecraft to perform more complex tasks. French physicists have predicted that in the field of chip manufacturing, silicon carbide is not far from silicon.
1, abrasive - mainly because of silicon carbide has a high hardness, chemical stability and a certain toughness, so silicon carbide can be used to make synthetic abrasive, coated abrasive and free grinding, and thus to process glass, ceramics, Cast iron and some non-ferrous metals, carbide, titanium, high-speed steel cutting tools and grinding wheel.
2, refractory materials and corrosion-resistant materials --- mainly because of silicon carbide has a high melting point (decomposition), chemical inert and heat shock resistance, so silicon carbide can be used for abrasive, ceramic products firing furnace with shed And sagger, zinc smelting industrial vertical cylinder distillation furnace with silicon carbide brick, aluminum electrolytic cell lining, crucible, small pieces of furnace and other silicon carbide ceramic products.
3, chemical use - because the silicon carbide can be dissolved in molten steel and molten steel from oxygen, metal oxide reaction to produce carbon monoxide and silicon slag. So it can be used as smelting steel purification agent, that is used as steel deoxidizer and cast iron tissue improver. This generally uses low purity silicon carbide to reduce costs. But also as a raw material for the manufacture of silicon tetrachloride.
4, electrical use - for heating elements, non-linear resistive components and high semiconductor materials. Heating elements such as silicon carbon rod (for 1100 ~ 1500 ℃ work a variety of electric furnace), non-linear resistance components, all kinds of lightning protection valve.
5, the other prepared into far infrared radiation coating or made of silicon carbide silicon plate with far infrared radiation dryer.